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Cambrian period

(Encyclopedia) Cambrian period [Lat. Cambria=Wales], first period of the Paleozoic geologic era (see Geologic Timescale, table) extending from approximately 570 to 505 million years ago. It was named…

Cambrian Mountains

(Encyclopedia) Cambrian Mountains kăm´brēən, rugged upland plateau occupying most of Wales; Aran Fawddwy (2,970 ft/905 m) is the highest point in the mountains. The area has deep lakes and is cut by…

Brewer's: Cambrian

Pertaining to Wales; Welsh. (See above.) The Cambrian mountains, like far clouds, That skirt the blue horizon, dusky rise. Thomson: Spring, 961-62. Source: Dictionary of Phrase and…

Brewer's: Cambrian Series

(in geology). The earliest fossiliferous rocks in North Wales. So named by Professor Sedgwick. Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894CambricCambrian A B C D E…

Geologic Timescale

(Encyclopedia) Geologic TimescaleEraPeriodEpochApproximate duration(millions of years)Approximate number of years ago(millions of years)1 Not an era but the time preceding the Cambrian.…

Conwy

(Encyclopedia) Conwy, formerly Conway, town (1981 pop. 12,969), Conwy, N Wales, at the mouth of the Conwy (Conway) River. Conwy is a picturesque tourist town with several notable old structures. A…

Sedgwick, Adam

(Encyclopedia) Sedgwick, Adam, 1785–1873, English geologist. He was a professor at Cambridge from 1818. His most important work was a study, made with R. I. Murchison, of the rock formation of…

trilobite

(Encyclopedia) trilobite trī´ləbīt˝, subphylum of the phylum Arthropoda that includes a large group of extinct marine animals that were abundant in the Paleozoic era. They represent more than half of…

Dee

(Encyclopedia) Dee, Welsh Dyfrdwy, river, c.70 mi (110 km) long, rising in the Cambrian Mts., Gwynedd, NW Wales, and flowing NE through Llyn Tegid (Bala Lake), then meandering through a picturesque…

Paleozoic era

(Encyclopedia) Paleozoic era pā˝lēəzō´ĭk, a major division (era) of geologic time (see Geologic Timescale, table) occurring between 570 to 240 million years ago. It is subdivided into six periods,…